<!DOCTYPE html>
<html>
    <head>
        <script src="vue.js"></script>
    </head>
    <body>
        <div id="app1">
        {{title}}
        </div>
        <div id="app2">
            {{title}}
        </div>
        <script>
           var Vue2 = Vue.extend({
               data(){
                   return{
                       title:'hello'
                   }
               }
           });

var vm1 = new Vue({el:'#app1'});
var vm2 = new Vue2({el:'#app2'});
        </script>
    </body>
</html>